MOULDED CASE CIRCUIT BREAKER

1.JXM1 series moulded case circuit breakeris one of products developed and manufactured by adopting international advanced technology.It is supplied with rated insulating voltage 800V and used for circuit of A.C. 50Hz,rated operating voltage AC 400V (or below), rated operatingcurrent up to 800A for infrequent changing over and starting of the motors.The products con-forms to IEC60947-2 standard. 2. Main Technical Specification(table1) TypeRated current (A)Polenum-berRatedinsui-atingvolt-age(V)Rated operat-ingvolt-age(V)Arcing- over distance (mm)Ultimate short circuit breaking capacity (KA)Servies short circuit breaking capacity (KA)Operation perform- anceUtiliza-tioncat-egoryLoadUnloadJKM1-63L(6),10 16,20 25 ,32 40,50 633, 4500V400V0251815008500AJKM1-63M05035JKM1-100L(10),16 20,25 32,40 50,63 80,100800V0(≤50)3522JKM1-100M0(≤50)5035JKM1-100H0(≤50)855010007000JKM1-225L100,125 160,180 200,225≤503522JKM1-225M≤505035JKM1-225H≤50855010004000JKM1-400L225,250 315,350 400≤505035JKM1-400M≤1006542JKM1-630L400,500 630≤1005035JKM1-630M≤1006542JKM1-630H≤10010065JKM1-800M630,700 8003≤1007550JKM1-800H≤10010065JKM1-1250M1000,1250≤10010065JKM1-1250H≤1001255 3. Protection Characteristic The thermodynamic release of a circuit breaker provides the feature of inverse time-delay,while the magnetic release is the instantaneous operation as shown on table 2(distribution cir-cuit breaker) and table 3 (motor protection circuit breaker). Table2Rated current ofrelease (A)Thermodynamic release( ambient temp )Operationalcurrent ofmagneticrelease (A)1.05In(cold state) Inoperative time(h)1.30In(heat state) Operative time(h)10≤In≤63≥1< 110In±20%225≤In≤630≥2< 2100≤In≤800≥2< 25In±20% Table3Rated current ofrelease (A)Thermodynamic release( ambient temp )Operationalcurrent ofmagneticrelease (A)1.0In(cold state) Inoperative time(h)1.20In(heat state) Operative time (h)1.50In(heat state) Operative time (h)7.2In(cold state) Operative time(h)10≤In≤225≥2<2≤4min ≤8min4s< Tp ≤10s 6s< Tp ≤20s12In±20%